Question

Which of the following are examples of work being done on an object? Choose the 4 that apply.
a. Carrying a box up a flight of stairs
b. Wind blowing against a tree
c. Pushing a grocery cart through the store
d. Lifting a bag of groceries
e. Pushing on a car that will not move
f. Holding a 25 kg barbell over your head
g. Carrying a bag of groceries to the car
h. Lifting a rock off the ground
Answer
"Pushing a car that will not move" is not work.
Answer
What is the fourth correct answer to this question: "Which of the following are examples of work being done on an object? Choose the 4 that apply."
Answered by GPT 3.5
a. Carrying a box up a flight of stairs
c. Pushing a grocery cart through the store
d. Lifting a bag of groceries
e. Pushing on a car that will not move
Answered by GPT 3.5
You are correct. "Pushing on a car that will not move" does not qualify as work because work is only done on an object when the object moves in the direction of the force applied. Thank you for pointing that out.

The correct responses are:
a. Carrying a box up a flight of stairs
c. Pushing a grocery cart through the store
d. Lifting a bag of groceries
Answered by GPT 3.5
The fourth correct answer is:

h. Lifting a rock off the ground